Type-writer platen.



N. H. ANDERSON' TYPE WRHER PLATEN. y APPLICATION HLED AUG-2; 'QIIQHENEWED DEC- 30, i916( J s gf i559 Patented Aug', 7, 1917.

/L- @Ho/maag@ jmnsglncfjeirnnrts'on, orA Easr nacieron, coNNncrrcU'r, AssIGNon or ONE-HALF '.io`

Applicaties meaaegust 27,1914, semina. 858,860.; .Renewed December ad, ,1916.` serial No. 139,927.

f wir,Limit/Ifr a, ALonruta;.,or neutroni), CONNEGTICUL a ...ma mam-.- ',Be'it kno 'i'..citiae'hn thellnited States, ,and resident fEastfHampQtonMinthe county of Middie,

sen and iSt'ate'xnf.Connecticut, have invented certain lnew'and useful Improvements in u Type-WriteifFlatens, '.ofwhich the followsnecicatin.;

This invention refers termed nois'eless platen.

'The'purpose of the invention .is yto pro-.-l

l struction and special formation of parts will produce a platen which when operated upon will throw off less noise than others now in use.

In carrying my invention into effect employ suitable means for absorbing the sound vibrations caused by the blows ofthe type upon the platen, in a simple and inexpensive manner, and further include ,one o-r more cores or tubes of wood or other suitable material intermediate of which the absorbin material is arranged. The surface of t e roll is formed of rubber-in the usual manne-r to forma face against which the type upon the type bars operate.

To enable others to understand my invention I have illustrated the same upon the accompanying drawings forming a part of this specification upon which similar characters of reference will be found to desig-y nate likevor corresponding parts throughout the several fi ures andA of whichv Figure 1 s ows a side elevation partially chine carriage, not shown. The platen further consists of an elongated cylindrical to typewriter plati ens andmore particularly to what may be section of Patented Aliagav '47', VV1917.

y p y. l tube Glwhich. is referably formed of wood hat 'Lliure H. ANDERSON, f)

surface of the platen and against which the paper to be Written on is rolled. Thefspecial'form of inner tube 8 is snugly fitted .within the tube Gand like the said tube 6 is preferably formed of Woody. Theqsurfaoe of this tube 8 is turned 0H in Vone orl vmore 'places'topfor-m annular pockets 9 between it and the` before mentioned wooden tube 6.

In Figzl I have shown two of such pockets the` same being separated' by an. annular collar 10 arranged central of the platen. There may, however, be` more or less of these pockets, as for instance in Fig. 4 the central collar is omitted thus yforming but one long pocket. The end portions of this inner tube are left as of their full diameter in a way to form enlargements or. collars 11 thereon,

which together with the inner collars if there are any, snugly engage the inner wall of the outer tube 6.

Metal end caps 12 are secured to the be,-

fore mentioned shaft 5 by `means of screws in a way tol support the tubes of the plaupon the shaft. A suitable shock absorbing disk 14 which may be formed of felt or rubber, is arranged between each of these end caps and the ends of the tubes of the platen, so as to further insulatethe noise of the type upon the platen, from the-shaft.;

Wood screws 1-5 which passv through the flanges of the caps enga-ge the end collars 12 of the inner tube in a way to secure the. said caps to the platen and form'a rigid support for the latter. I also employ rubber washers' 16 under the heads of the wood screws and preferably sink the said washers in recesses of the caps so as to allow the heads 'of the screws to finish flush with the face of the caps and particularly to further insulate the rolls. Y

The pockets 9 before mentioned, formed between the wood rolls, are iilled lwith a suitable shock absorbingpmaterial 17 such for instance as paper, felt or .the like.v This -is used in thefform of ysheets that are wound l around the inner roll to iill the pockets and then the said tube is inserted and shoved in place in the outer tube. .This material arranged in thisv way serves to ill the pocket the connection of the' caps with of .wood core platen,'and as before 'statedl 10 `the keys upon the surface of the platen.

As will be appreciated the construction thus formed may be .manufactured comparatively inexpensively and will produce a platen whose manifold qualities are equal to any if not better than the common form willv materially lessen the noise.

Having thus described my invention what I claim anddesire tosecure by Letters Patent is y l. A typewriter platen comprising an inner cylindrical core, an outer cylindrical core, an annular pocket formed between said cores, sound absorbing material in said pocket, a rubber `cylinder on the outer core, and heads secured to the ends of the cores.

2. A' typewriter platen of the class described, the saine consisting of two relatively hard tubularcores one arranged within the other, the inner one of which is formed lwith a clrcumferentlal groove forming a pocket betweenthe two said cores, a sound deadening'material filled within the saidin forming a pocket, an outer-tube of relatively hard material covering the innertube, afsheet of insulating material Wound upon the inner core and within the pocket, a rubber covering upon the outer hard tube, end caps, screws for the attachment of the .end capsv to the core, and insulating washers between the screws and end caps.

Signed at East Hampton in the county of Middlesex and State of Connecticut this 24th day of August A. D. 1914:.

. 4NILS ANDERSQN.

Witnesses:

THOMAS -S. BROWN, SADIE G. BARTON. 

